LibJS: Start implementing Intl Segment Iterator objects

Userland/Libraries/LibJS/Runtime/Intl/SegmentIterator.h

@@ -0,0 +1,35 @@
+/*
+ * Copyright (c) 2022, Idan Horowitz <idan.horowitz@serenityos.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <LibJS/Runtime/Intl/Segmenter.h>
+#include <LibJS/Runtime/Object.h>
+
+namespace JS::Intl {
+
+class SegmentIterator final : public Object {
+    JS_OBJECT(SegmentIterator, Object);
+
+public:
+    static SegmentIterator* create(GlobalObject&, Segmenter&, String);
+
+    SegmentIterator(GlobalObject&, Segmenter&, String);
+    virtual ~SegmentIterator() override = default;
+
+    Segmenter const& iterating_segmenter() const { return m_iterating_segmenter; }
+    String const& iterated_string() const { return m_iterated_string; }
+    size_t iterated_string_next_segment_code_unit_index() const { return m_iterated_string_next_segment_code_unit_index; }
+
+private:
+    virtual void visit_edges(Cell::Visitor&) override;
+
+    Segmenter& m_iterating_segmenter;                            // [[IteratingSegmenter]]
+    String m_iterated_string;                                    // [[IteratedString]]
+    size_t m_iterated_string_next_segment_code_unit_index { 0 }; // [[IteratedStringNextSegmentCodeUnitIndex]]
+};
+
+}